中国科学院云南天文台学术报告通知

2025年第29期

报告题目：From Mass Loss to Explosion: Tracing the Diversity and Commonality in Core-Collapse Supernovae

报告人：方其亮 博士后（Dr. Qiliang Fang）

报告人单位：日本国立天文台 (National Astronomical Observatory of Japan)

报告语言：中文/English

报告时间：2025年7月15日（星期二）10:30-11:30

报告地点：1号楼412会议室

报告摘要：

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Massive stars are expected to end their lives as core-collapse supernova (SN) explosions. Systematic investigation of these catastrophic events offers a valuable window into both stellar evolution and the physics of core collapse. In this talk, I will introduce our recent research on Type II (hydrogen-rich) SNe. In particular, we combine late-phase (nebular) spectroscopy, which probes the innermost ejecta, with early-phase light curve modeling, which constrains the structure of the progenitor’s outer envelope. By bridging the surface and core properties of the progenitors in a large sample of well-observed SNe II, we uncover a wide range of mass-loss histories and evolutionary pathways that go beyond the standard stellar evolution models. Despite this diversity, we find a similarity in their explosion mechanisms, which closely match the expectations of modern neutrino-driven core-collapse simulations. This apparent diversity in progenitor evolution but unity in explosion mechanism offers new insights into the roles of mass loss, binary interaction, and envelope stripping in shaping the observed variety of SNe II. I will discuss how our results relate to the broader family of stripped-envelope supernovae and how phenomena such as stellar pulsations and binary mass transfer may contribute to the continuum between classical SNe II and more exotic transients. This unified framework provides a physically grounded way to interpret the growing diversity in massive star explosions across observational classes.

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报告人简介： 

Dr. Qiliang Fang is a JSPS postdoctoral fellow at the National Astronomical Observatory of Japan. He received his B.Sc. from Peking University in 2017 and his Ph.D. from Kyoto University in 2023. Qiliang's research primarily focuses on exploring the mass-loss history and explosion mechanisms of core-collapse supernovae. He is also interested in hydrodynamic and radiative transfer modeling of transients,aiming to reveal the origin of their observational diversity.

云台邀请方：大样本恒星演化研究团组

邀请方联系人：柳正伟